Study of Anlotinib in Patients With Medullary Thyroid Carcinoma(ALTER01031)

Inclusion Criteria: 1. Signed and dated informed consent 2. Histological documentation of medullary thyroid carcinoma(MTC),Unable to surgery(Stage IV) or metastasis ,With measurable disease (using RECIST1.1) 3. ECOG PS:0-1,Life expectancy of more than 6 months 4. main organs function is normal Exclusion Criteria: 1. Prior treatment with Anlotinib or VEGFR-targeted therapies(such as Vandetanib,Cabozantinib,Lenvatinib,Sunitinib,Sorafenib etc.) 2. Subjects received radiotherapy external exposure within 3 months prior to the first dose of study drug or plan to be received any anti-cancer treatment during study 3. Patients suffering from other malignancies currently or within 5 years, except for cured cervical carcinoma in situ, non-melanoma skin cancers and superficial bladder cancer \[ Ta (non-invasive carcinoma), Tis (carcinoma in situ) and T1 (carcinoma invasion into lamina propria) \] 4. CTCAE(4.0) Grade 1 or higher non-remission toxicity induced by any other previous treatments，excluding alopecia and Grade 2 or lower neurotoxicity induced by oxaliplatin 5. Patients with factors that could affect oral medication (such as dysphagia etc.) 6. Patients with pleural effusion or ascites, causing respiratory syndrome (CTCAE Grade 2 or higher dyspnea \[Grade 2 dyspnea refers to Shortness of breath with a small amount of activities, affecting Instrumental activities of daily life\]) 7. Patients underwent major surgical treatment，open biopsy or significant traumatic injury within 28 days prior to assignment